Hello Sylvia,
Thank you for taking the time to help me.
1) On both the built computer and the Lenovo Thinkpad, the wireless adapter is the Intel Dual Band Wireless-AC 7260.
2) Interestingly enough, on the built computer, I cannot see any wireless networks. I am at a college campus, and I can see all of the networks using the Lenovo, but for some reason, I cannot see it with the computer I built. That seems really strange. I've tinkered with the adapter settings so that it should be able to see any available 802.11a/b/g networks, but unfortunately I cannot see any.
Let me know what other information you need.
AC